Piston-head.



B. W. BEERY.

PISTON HEAD.

APPUCATION FILED SEPT. 2a. 1915.

1,219,223. Pmmd- Mar. 13, 1917.

A TTORIIE Y8 the enlargement at the inner end of the plug and afterward deformed to prevent a. return movement over the said lug.

2. The combination with t e piston head and the plugsthereof, of means in connection with each plug for reventing longitudinal movement thereof with respect to the" head after the plug has been inserted, said means com rising counterbores at the outer ends of tiie openings for the plugs, the large end of the plug havin a'beveled marginal rib fitting the counter ore at the paid end, and the other end of the plug being upset to fill the 'eounterbore.

3. In combination with the piston head and the plugs thereof, of means in connection with each plug and within the head i it? for preventing longitudinal movement thereof with respect to the head after the plug has been inserted. p

4. In combination with the piston head and the plugs therefor, of means seated on each plug and within the head for prevent-' BERNARD WILLIAM BEERY. 

